Instruction Manual
D103761X012
March 2021
DG Series
Direct-Operated RegulatorsManual
Page 1: ...Instruction Manual D103761X012 March 2021 DG Series Direct Operated Regulators Manual...
Page 2: ...damage and personal injury or death Regulators must be installed operated and maintained in accordance with federal state and local codes rules and regulations and Emerson Process Management Regulato...
Page 3: ...Regulator Spring Set Range Maximum Setpoint of Pressure Reducing Regulator 1 Low Pressure Actuator DOA330 3 0 bar 43 psig High Pressure Actuator DOA180 Nitrile NBR Diaphragm 25 bar 363 psig Fluorocar...
Page 4: ...120 C 12 1 175 12 1 175 12 1 175 Liquid 7 to 93 C 12 8 186 12 8 186 12 8 186 1 Maximum inlet outlet and emergency pressures for constructions with Fluorocarbon FKM diaphragm are limited to 15 bar 218...
Page 5: ...C 2 2 to 6 31 9 to 87 FKM 7 to 120 C DN 80 and DN 100 1 NBR 29 to 80 C 2 5 to 6 36 3 to 87 FKM 7 to 120 C Liquid all NBR 29 to 80 C FKM 7 to 93 C ERSA01288A0 Yellow WCB PN 16 RF Gas all NBR 29 to 80...
Page 6: ...NBR 29 to 80 C FKM 7 to 120 C Liquid All NBR 29 to 80 C FKM 7 to 93 C ERSA01290A0 Red WCB PN16 RF Gas All NBR 29 to 80 C 9 5 to 16 138 to 232 FKM 7 to 120 C 9 5 to 10 138 to 145 Liquid All NBR 29 to 8...
Page 7: ...g The pressure under the actuator diaphragm is balanced by the spring force acting at the topside of the diaphragm through the action of the actuator stem the valve plug moves to or away from the seat...
Page 8: ...E DIAPHRAGM TRIM PARTS BODY OUTLET INLET INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE Figure 1 Operational Schematic of DG Series PRV Figure 2 Operational Schematic of DG Series BPV ADJUSTING S...
Page 9: ...erature should comply with the requirements In low temperature areas heat tracing measures may be considered to heat the pipelines of the PRV in winter At special occasions such as installations in ar...
Page 10: ...tion Schematic for DG Series PRV DN 5 DN 5 DN 10 FILTER UPSTREAM BLOCK VALVE PRESSURE GAUGE DOWNSTREAM BLOCK VALVE INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE Figure 4 Installation Schematic f...
Page 11: ...reeze over 3 Body installed horizontally with the actuator spring case pointing upward is required 4 Do not forcefully install the regulator when connecting the inlet and outlet pipelines 5 If a quick...
Page 12: ...ercise caution always 5 Keep in this position until pressure is stabilized 6 Fully open the outlet block valve Note The regulator is factory set as specified on the order or at the midpoint of the spr...
Page 13: ...ts depend upon the severity of service conditions or the requirements of local state and federal regulations Regulators that have been disassembled for repair must be tested for proper operation befor...
Page 14: ...placing Nameplate Be certain that the nameplates are updated to accurately indicate any field changes in equipment materials service conditions or pressure settings 9 Pressure Reducing Regulator Disas...
Page 15: ...ey 8 and Bolt key 58 Carefully remove Upper Casing key 59 14 Carefully loosen the Lock Nut key 60 and Thin Nut key 34 in the middle of diaphragm take out the Lower Spring Seat key 37 Remove the Diaphr...
Page 16: ...t onto the outer groove of the Sleeve Guide key 10 Lubricate the O ring key 3 and put it onto the stage corner of the Body key 1 Assemble the Bonnet key 2 onto the body key 1 please make sure all the...
Page 17: ...Lower Casing key 54 onto the Body key 1 using Bolt key 16 and Washer key 17 Tight it with the torque value listed in Table 10 40 Lubricate O ring key 68 and assemble it onto the inner groove of Diaphr...
Page 18: ...Torque PART NAME TORQUE N m 1 In 2 In 3 In 4 In Bolts key 16 M8 25 25 to 30 Bolts key 42 M8 25 Nuts key 40 M8 28 to 32 Bolts key 13 26 to 36 60 to 75 54 to 74 94 to 128 Thin Nut key 34 M10 16 to 19 N...
Page 19: ...ing or replacing individual internal trim parts 16 Carefully remove the flange Nut key 13 and Washer key 8 Slowly remove the Bonnet key 12 checking the O ring key 11 on the corner of the bonnet and bo...
Page 20: ...ange face of Upper Casing key 43 Assemble the Upper Casing Base Assemble on to the diaphragm key 39 carefully make sure the bolts holes are aligned Lubricate the screw of Bolt key 42 connecting the Up...
Page 21: ...y Emerson regulator because they will void your warranty might adversely affect the performance of the valve and could give rise to personal injury and property damage 11 Parts Ordering When correspon...
Page 22: ...DN 100 NPS 4 ERSA01766A1 11 Sliding Polytetrafluoroethylene PTFE MoS2 2 pcs required DN 25 NPS 1 ERSA02938A0 DN 50 NPS 2 ERSA02849A0 DN 80 NPS 3 ERSA02939A0 DN 100 NPS 4 ERSA02940A0 Key Description P...
Page 23: ...ainless steel JI1GC000M10 30 Nameplate 31 Rivet 6 pcs required JI1JD002005 61 Arrow 1V105938982 Key Description Part Number 62 ConnectorPad Low PressureActuatorOnly Steel 20 DN 25 50 80 NPS 1 2 3 ERSA...
Page 24: ...w Pressure 25 1 RDGP1X01FA0 50 2 RDGP2X01FA0 80 3 RDGP3X00FA0 100 4 RDGP4X00FA0 DOA180 1 DOA180 2 High Pressure 25 1 RDGP1X00FA1 50 2 RDGP2X00FA1 80 3 RDGP3X00FA1 100 4 RDGP4X00FA1 Key 1 Body DG Serie...
Page 25: ...109 Fluorocarbon FKM DN 25 NPS 1 JI323355040 DN 50 NPS 2 JI323530060 DN 80 NPS 3 JI323530A87 DN 100 NPS 4 JI323530109 Key Description Part Number 8 Plane Washer Carbon steel Low Pressure Actuator DN 5...
Page 26: ...770A1 DN 100 NPS 4 ERSA01792A1 20 Stem Bushing 316 Stainless steel ERSA01213A1 21 Bushing PTFE 2 pcs required ERSA01214A0 Key Description Part Number 22 O ring Nitrile NBR JI321180A21 Fluorocarbon FKM...
Page 27: ...A180 1 DOA180 2 High Pressure 35 1 RDGB1X00FA1 50 2 RDGB2X00FA1 80 3 RDGB3X00FA1 100 4 RDGB4X00FA1 Key 1 Body DG Series Backpressure Regulator MATERIAL END CONNECTION DN 25 NPS 1 DN 50 NPS 2 DN 80 NPS...
Page 28: ...0015 Stainless steel 8 pcs required JI1AF080015 46 O ring Low Pressure Actuator Only JI321265140 47 Base Low Pressure Actuator Only WCB Carbon steel ERSA01268A0 CF8M Stainless steel ERSA01268A1 48 Con...
Page 29: ...DG Series Regulators 29 Figure 7 Assemblies Schematic for DG Series PRV Pressure Reducing Regulator ASSEMBLIES OF CONNECTOR FOR PRV LOW PRESSURE ACTUATOR DN 25 50 80 NPS 1 2 3...
Page 30: ...DG Series Regulators 30 Figure 8 Assemblies Schematic for DG BPV Backpressure Regulator Figure 9 Assemblies Schematic for Low Pressure Actuator...
Page 31: ...DG Series Regulators 31 Figure 10 Assemblies Schematic for High Pressure Actuator...
Page 32: ...their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products...
